Republican Donald Trump, who has made his criticism of a pending Pacific trade agreement central to his campaign, on Tuesday was to visit a Seattle suburb that is home to a large Boeing Co. plane manufacturing facility that depends heavily on sales to Asian markets.

Trump's campaign has booked the Xfinity Arena, which seats thousands of people, in anticipation of a large crowd. The Republican presidential candidate, who has courted manufacturing workers with vows to tear up trade agreements, is due to speak at 7 p.m. Pacific Time (10 p.m. EDT).

The rally is likely to attract workers from Boeing, the world's largest aerospace company. Supporters of the 12-nation Trans-Pacific Partnership (TPP) point to Boeing's aircraft sales to Asia to tout the benefits of the agreement. Secretary of State John Kerry visited a nearby plant earlier this year to rally support for the pact.